Im guessing you been reading too much of the forums lately
about all the BUL engines going bang.
And treading lightly in your Audi. And to be honest I dont blame you and nor are you alone.
This recent amount of 2.0t motors going because of the pick up and oil pumps is quite scary. Its like they all have a self destruct mode in them.
But getting to the point.
The oil pick up tube is part number 06F115251B which is the revised part and this is £30 inc vat.
According to the "book or guide" of automotive labour charges it says 2.2 hours to drop the sump, but I would use that strongly as a guide. As I am sure you read the recent silver DTM that motor blew and the owner wanted to know the rough times it takes to remove and refit the engine. As craigcull politely said those figures are for the ideal world were no bolts are seized and all the correct tools are beside you.
Cam belt labour wise you looking at about 2.6 hours which is about correct. That is excluding the water pump, cam belt, tensioners and coolant unless they reuse your previous coolant. Audis price for the cambelt is £449 with a 2 year warranty or £549 with the waterpump.
As for the cam chain there is actually 2 chains in the motor one that drives the oil pump and another that drives the intake camshaft.
So ill assume you referring to the one at the rear of the motor. I got quoted roughly 5-7 hours labour and then the parts which is the following:
exhaust cam sprocket bolt, timing chain tensioner, valve cover gasket, timing chain rear cover gasket, timing chain, vacuum pump rubber gasket, timing tensioner bolts x3, High pressure fuel pump rubber gasket.
Those work out to £210.
Hope this helps